noun ho·moi·ou·si·an \hō-ˌmȯi-ˈü-zē-ən, hä-, -ˈü-sē-\

Definition of homoiousian

  1. :  an adherent of an ecclesiastical party of the fourth century holding that the Son is essentially like the Father but not of the same substance

Origin and Etymology of homoiousian

Late Greek homoiousios of like substance, from Greek homoi- homeo- + ousia essence, substance, from ont-, ōn, present participle of einai to be — more at is

First Known Use: 1732

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